April07_2010

April07_2010 - Spring 2010 April 7th list | no hw1 hw2 hw3...

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Spring 2010 – April 7 th . list +-----------------------------------------------+ | no hw1 hw2 hw3 exam1 exam2 exam3 | |-----------------------------------------------| 1. | 1 15 . 70 79 73 60 | 2. | 2 62 95 50 71 89 64 | 3. | 3 66 80 . 43 16 . | . sum Variable | Obs Mean Std. Dev. Min Max -------------+-------------------------------------------------------- no | 206 103.5 59.61124 1 206 hw1 | 206 96.47573 8.029026 15 100 hw2 | 194 96.26289 8.449053 40 100 hw3 | 191 93.32461 10.12134 50 100 exam1 | 206 81.87621 9.58431 29 95 -------------+-------------------------------------------------------- exam2 | 204 83.61275 8.367898 16 98 exam3 | 203 77.83744 9.9094 45 100 Our general model exam3 = f(exam1, exam2, hw1, hw2, hw3) Our simple linear regression exam3 i = β 0 + β 1 exam1 i + u i , i=1,--,206 In STATA, reg exam3 exam1 . reg exam3 exam1 Source | SS df MS Number of obs = 203 -------------+------------------------------ F( 1, 201) = 31.89 Model | 2716.42649 1 2716.42649 Prob > F = 0.0000
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April07_2010 - Spring 2010 April 7th list | no hw1 hw2 hw3...

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